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Subject: Re: Test Position - Avoid Nxa8

Author: John Merlino

Date: 13:00:24 11/29/02

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On November 29, 2002 at 15:45:51, bobby palacios wrote:

>[D] r1b2b1r/ppNk3p/2n4q/3pp3/4n1pB/8/PPP2PPP/R2QKBNR w KQ - 0 13
>
>A very interesting position aroused between Aristarch 4.4 vs TheKing 3.12(game
>in 25).  After a wild opening, TheKing 3.12 went straight for Aristarch's king,
>at this critical point Aristarch took the rook at a8, instead of the pawn at d5,
>and was crushed.  How many programs avoid Nxa8 at a reasonable time?  (Aristarch
>played Nxa8 after 35 seconds)

Chessmaster 9000, on a P3-733, needs 3 seconds to avoid Nxa8:

Time	Depth	Score	Positions	Moves
0:00	1/3	1.71	1654		13.Nxa8 Qxh4 14.Qxd5+ Nd6 15.Ne2
0:00	1/4	1.69	6961		13.Nxa8 Qxh4 14.Qxd5+ Nd6 15.Bb5
					Qf6 16.Ne2
0:00	1/5	1.37	22918		13.Nxa8 Qxh4 14.Qxd5+ Nd6 15.Bb5
					Bg7 16.Rd1 Qf6
0:01	1/6	0.41	92608		13.Nxa8 Bb4+ 14.c3 Nxc3 15.bxc3
					Bxc3+ 16.Ke2 Nd4+ 17.Kd3 Bxa1 18.Qxg4+
					Kc6 19.Qg5
0:02	1/7	-0.23	170672		13.Nxa8 Bb4+ 14.c3 Nxc3 15.bxc3
					Bxc3+ 16.Ke2 Nd4+ 17.Kd3 Bxa1 18.Qxa1
					Qxh4 19.Ne2 Nc6
0:03	1/7	0.05	254986		13.Nxd5 Qxh4 14.g3 Qg5 15.Nf6+
					Kc7 16.Nxe4 Qh6 17.h4 Kb8
0:07	1/8	0.02	581986		13.Nxd5 Qxh4 14.g3 Qg5 15.h4 Qd2+
					16.Qxd2 Nxd2 17.Kxd2 Kd8 18.Bg2
					Bh6+ 19.Ke1 Be6
0:18	1/9	-0.24	1498562		13.Nxd5 Qxh4 14.g3 Qg5 15.Nf6+
					Kc7 16.Nxe4 Qg6 17.Bg2 Bf5 18.Nc3
					Bxc2
0:49	1/10	-0.38	4123605		13.Nxd5 Qxh4 14.g3 Qg5 15.h4 Qg6
					16.h5 Qf7 17.Nf6+ Kc7 18.Nxe4 Be6
					19.c3 Rd8

jm



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